<template>
    <div>
        <div class="search">
            <input class="search-input" type="text" placeholder="输入城市名或拼音" v-model="keyword" />
        </div>
        <div class="search-content" ref="wrapper" v-show="keyword">
            <ul>
                <li class="search-item border-bottom" v-for="item of list" :key="item.id" @click="handleCityChange(item.name)">{{ item.name }}</li>
                <li class="search-item border-bottom no-search-item" v-show="noSearch">没有找到匹配数据</li>
            </ul>
        </div>
    </div>
</template>

<script>
import BScroll from 'better-scroll'
import { mapMutations } from 'vuex'

export default {
    name: 'CitySearch',
    props: {
        cities: Object
    },
    data(){
        return{
            keyword: '',
            list: [],
            timer: null
        }
    },
    methods: {
        handleCityChange(city){
            // this.$store.commit('changeCity',city)
            this.changeCity(city)
            this.$router.push('/')
        },
        ...mapMutations({
            changeCity: 'changeCity'
        })
    },
    computed: {
        noSearch(){
            return !this.list.length
        }
    },
    mounted(){  //页面挂载完毕之后自动执行
        this.scroll = new BScroll(this.$refs.wrapper)
    },
    watch: {
        keyword(){
            if(this.timer){
                clearTimeout(this.timer)
            }
            if(!this.keyword){
                this.list = []
                return
            }
            this.timer = setTimeout(()=>{
                const result = []
                for(let i in this.cities){
                    this.cities[i].forEach((value)=>{
                        if(value.spell.indexOf(this.keyword) > -1 || value.name.indexOf(this.keyword) > -1){
                            result.push(value)
                        }
                    })
                }
                this.list = result
            },100)
        }
    }
}
</script>

<style lang="stylus" scoped>
    @import '~styles/varibles.styl'

    .search
        height .72rem
        padding 0 .1rem
        background $bgColor
        .search-input
            box-sizing border-box
            width 100%
            height .62rem
            padding 0 .1rem
            line-height .62rem
            text-align center
            border-radius .06rem
            color #666
    .search-content
        position absolute
        top 1.58rem
        left 0
        right 0
        bottom 0
        overflow hidden
        background #eee
        z-index 1
        .search-item
            line-height .62rem
            padding-left .2rem
            color #666
            background #fff
        .no-search-item
            text-align center
</style>
